Answer:
Sulfur belongs to the chalcogen family. Other members of the family are oxygen, selenium, tellurium, and polonium. These elements make up Group 16 (VIA) of the periodic table. The periodic table is a chart that shows how chemical elements are related to each other.
The term chalcogen comes from two Greek words meaning "ore forming." An ore is a naturally occurring mineral used as a source for an element. Many ores are compounds of a metal and oxygen or a metal and sulfur. Compounds that contain two elements, one of which is sulfur, are called sulfides. For example, a beautiful gold-colored mineral is called pyrite, or "fool's gold," because it looks so much like real gold. Pyrite is iron sulfide (FeS 2 ).
Sulfur was known to ancient peoples. Its physical and chemical properties are very distinctive. It often occurs as a brilliant yellow powder. When it burns, it produces a clear blue flame and a very strong odor.
SYMBOL
S
ATOMIC NUMBER
16
ATOMIC MASS
32.064
FAMILY
Group 16 (VIA)
Chalcogen
PRONUNCIATION
SUL-fur
Sulfur, also spelled as sulphur, is a very important element in today's world. Its most important use is in the manufacture of sulfuric acid (H 2 SO 4 ). There is more sulfuric acid made than any other chemical in the world. It has an enormous number of important uses.
Discovery and naming
Sulfur must have been well known to ancient peoples. They sometimes referred to it as brimstone. Sulfur sometimes occurs in bright yellow layers on the top of the earth. It has a sharp, offensive odor. When it burns, it gives off a strong, suffocating smell. The odor is like that produced when a match is struck.
The Bible mentions brimstone in a number of places. For example, Sodom and Gomorrah were two towns destroyed by God for the wicked ways of their citizens: "The Lord rained upon Sodom and upon Gomorrah brimstone and fire."
But ancient people certainly did not think about sulfur the way modern chemists do. In fact, they used the word "element" to talk about anything that was basic. Ancient Greek philosophers, for example, thought that everything consisted of four elements: earth, fire, water, and air. Other philosophers thought there were only two elements: sulfur and mercury.
But early thinkers were often confused as to what they meant by the word "sulfur." They often were talking about anything that burned and gave off large amounts of smoke. To them, "sulfur" was really a "burning substance." It took centuries for scientists to identify sulfur as an element.
Explanation:
The most chemically similar element like sulfur is oxygen.
What is the most similar element to sulfur?Oxygen is the most similar element to sulfur.
Let's see the similarity between oxygen and sulfur:
Atomic radius:Sulfur - 0.88
Oxygen - 0.48
Ionic radius:Sulfur - 1.84
Oxygen - 1.40
Electronegativity:
Sulfur (2.5) is less electronegative than oxygen, (3.4)
They have the same number of electrons in their outermost cell.Thus, oxygen is most similar to sulfur.
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Which object has the MOST gravity in the solar system?
Answer: Jupiter.
Explanation: Jupiter is the largest and most massive planet in the Solar System. Its mean radius, at 69,911 ± 6 km, makes it 10.97 the times the size of Earth, while its mass (1.8986×1027 kg) is the equivalent of 317.8 Earths.
Answer:
Jupiter
Explanation:
It is 2.5 times on what we experience on earth, it’s just depends on 3 things the density, mass and size
Pls help me with this question!??
I think the answer is #1.
For starters, if a species goes extinct, their predators would go down since their source of food is now gone.
Also, habitat loss accounts for the biggest reason animals are becoming extinct
3)
0.09 moles of sodium sulfate in 12 mL of solution.
Answer:
7.5 M
Explanation:
In order to find a solution's molar concentration, or molarity, you need to determine how many moles of solute, which in your case is sodium sulfate,
Na
2
SO
4
, you get in one liter of solution.
That is how molarity was defined -- the number of moles of solute in one liter of solution.
So, you know that you have
0.090
moles of solute in
12 mL
of solution. Your goal here will be to scale up this solution by using this information as a conversion factor to help you determine the number of moles of solute present in
first correct awnser will be brainleist
In school, Jarrett learned that salt lowers the freezing point of water. He wants to test this in a home experiment.
Jarrett adds 100 mL of water at 25°C into each of three identical containers. He then adds 0 g of salt to the first container, 25 g of salt to the second, and 50 g of salt to the third container.
Which of the following is a constant in his experiment?
A the amount of water
B the starting temperature of the water
C the amount of salt
D the type of container
A. the amount of water is a constant (aka independent variable)
The amount of water is constant in the Jarrett in each of the three identical containers experiment.
What is a boiling point?The temperature at which a liquid boils and turns to vapour.
The water molecules need more energy to produce enough pressure to escape the boundary of the liquid.
The more salt (or any solute) added to water, the more you raise the boiling point.
When the ionic compound salt is added to the equation, it lowers the freezing point of the water.
Salt molecules block water molecules from packing together when the temperature is lowered.
It then prevents them from becoming ice. More water molecules leave the solid phase than the ones entering the solid phase.
Hence, option A is correct.
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Eddie is going to do an experiment to find out which freezes more easily—distilled water or salt water. In what order should he do the following steps in his experiment?
Can you guys answer fast? I need big help
1. Make a Prediction
2. Fill both beakers with water
3. Dissolve salt in one of the beakers
4. Place both in the freezer and observe
5. Write a report
(Always make the prediction first! That's a hypothesis!)
Explanation:
A hypothesis is defined as an idea or explanation which is framed without any testing or experimentation.
And, in order to verify the hypothesis we need to perform the experiment. And, on the basis of experimentation we can conclude whether our hypothesis was correct or not.
For example, when we have to perform an experiment to determine which freezes more easily—distilled water or salt water. Then the steps in this experiment should be as follows.
Make a prediction about which liquid will freeze first.Fill two beakers with 250 mL of distilled water.Dissolve 30 grams of salt in one of the beakers.Place both beakers in a freezer and observe which liquid freezes first.Write a report on his findings.Examine the flowchart of the common states of matter.
solids < liquids < gases
Which option states a property of matter that matches the order of the states of matter in the flowchart?
Select all that apply.
space between particles
kinetic energy of particles
density of matter
speed of particle motion
Answer:
a AND b
Explanation:
The flowchart shows the order of the common states of matter as solids, liquids, and gases. To find the properties that match this order, let's examine each option:
1. Space between particles: This property refers to the distance between particles in a substance. In solids, particles are tightly packed together, so there is less space between them. In liquids, particles are less tightly packed, so there is more space between them compared to solids. In gases, particles are very spread out, so there is the most space between them. Therefore, this property matches the order of the states of matter in the flowchart.
2. Kinetic energy of particles: Kinetic energy refers to the energy of motion. In solids, particles have the least amount of kinetic energy as they vibrate in fixed positions. In liquids, particles have more kinetic energy as they move more freely, but still stay close together. In gases, particles have the most kinetic energy as they move rapidly and spread out. Therefore, this property also matches the order of the states of matter in the flowchart.
3. Density of matter: Density refers to the mass of a substance per unit volume. While the density of matter does change between the different states, it does not match the order of the states of matter in the flowchart. Solids can have a higher density than liquids, and liquids can have a higher density than gases. So, this property does not match the order shown in the flowchart.
4. Speed of particle motion: The speed of particle motion does change between the different states, but it does not match the order of the states of matter in the flowchart. The particles in solids have the slowest motion, followed by particles in liquids, and then particles in gases which have the fastest motion. So, this property does not match the order shown in the flowchart.
In summary, the properties of matter that match the order of the states of matter in the flowchart are the "space between particles" and the "kinetic energy of particles." These properties help explain the differences between solids, liquids, and gases based on how closely packed the particles are and how much they are moving.
The order of the states of matter in the flowchart is related to the space between particles and the speed of particle motion.
Explanation:The flowchart represents the order of the three common states of matter: solids, liquids, and gases. As we move from solids to liquids to gases, the space between particles increases. In solids, the particles are closely packed together, whereas in liquids, the particles have some space between them, and in gases, the particles are widely spaced apart. Likewise, the speed of particle motion increases as we move from solids to liquids to gases. In solids, the particles are tightly packed and vibrate in place, in liquids, the particles move more freely and are able to slide past each other, and in gases, the particles move rapidly and randomly in all directions.
However, the density of matter does not follow the same order as the flowchart. The density of a substance depends on the mass and volume, and it can vary greatly between different substances in the same state of matter. For example, the density of lead (a solid) is much higher than the density of water (a liquid).
The kinetic energy of particles is also not directly related to the order of the states of matter in the flowchart. The kinetic energy of particles is a measure of their motion, and it can vary within the same state of matter depending on the temperature. For instance, the kinetic energy of the particles in boiling water (a liquid) is higher than that in cold water (also a liquid).
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Which of these elements in group 1A has the largest atomic radius?
cesium
rubidium
potassium
sodium
A. Cesium is your answer
Answer:
Cesium
Explanation:
The atomic radius is the distance between the nucleus and the outermost orbital of an atom. By the atomic radius, it is possible to determine the size of the atom.
The atomic radius is a periodic trend that means that it is a specific pattern in the properties of the chemical elements that are revealed in the periodic table
This property increases as follows (see attached file)
Therefore the element that is lower in the group is the one with the largest radius
In this case, the one located below in the group is cesium, that is, the one with the largest radius
How does Arrhenius describe acids and bases?
As defined by Arrhenius:
An Arrhenius acid is a substance that dissociates in water to form hydrogen ions (H+). In other words, an acid increases the concentration of H+ ions in an aqueous solution. This protonation of water yields the hydronium ion (H3O+); in modern times, H+ is used as a shorthand for H3O+ because it is now known that a bare proton (H+) does not exist as a free species in aqueous solution.
An Arrhenius base is a substance that dissociates in water to form hydroxide (OH–) ions. In other words, a base increases the concentration of OH– ions in an aqueous solution.
Hope this helps!
Explanation:
According to Arrhenius concept:
An acid is defined as a substance which donates hydronium ions [tex](H_3O^+)[/tex] in water.
[tex]HA(aq)+H_2O(l)\rightarrow A^-(aq)+H_3O^+(aq)[/tex]
For example: hydrochloric acid , nitric acid etc.
[tex]HCl(aq)+H_2O(l)\rightarrow Cl^-(aq)+H_3O^+(aq)[/tex]
[tex]HNO_3(aq)+H_2O(l)\rightarrow NO_3^{-}(aq)+H_3O^+(aq)[/tex]
A base is defined as a substance which donates hydroxide ions [tex](OH^-)[/tex] when dissolved in water.
[tex]BOH(aq)\rightarrow B^+(aq)+OH^-(aq)[/tex]
For example: sodium hydroxide, calcium hydroxide etc.
[tex]NaOH(aq)\rightarrow Na^+(aq)+OH^-(aq)[/tex]
[tex]Ca(OH)_2(aq)\rightarrow Ca^{2+}(aq)+2OH^-(aq)[/tex]
Models are useful because
A) they are very easy to create and destroy.
B) they are very expensive and time consuming to create.
C) they are more accurate than the observing the real phenomenon.
D) they allow us to test possible forces of nature without waiting for them to occur.
I believe the answer is D
Answer: D
Explanation: Got it right on USA testprep
whats is nail polish remover
nail polish remover is acetone
Which of the following apply to a solution’s concentration.
(((((((((Select all that apply.))))))))
The physical properties of a solution are not affected by the concentration of the components.
Boiling points and freezing points of solutions change as the concentration of the solute changes.
Moles of solute = (Liters of solution) x (Molarity of solution)
(Initial Concentration)(Initial Volume) = (Final Concentration) (Final Volume)
Concentration affects if an acid is weak or strong.
Answer:
All of them apply according to the exam your are on because they all need concentration to work up the certain chemical
Explanation
The physical properties of a solution are not affected by the concentration of the components.
Boiling points and freezing points of solutions change as the concentration of the solute changes.
Moles of solute = (Liters of solution) x (Molarity of solution)
(Initial Concentration)(Initial Volume) = (Final Concentration) (Final Volume)
Concentration affects if an acid is weak or strong.
Answer : All the given options are applicable for a solution’s concentration.
Explanation :
(1) The physical properties of a solution are not affected by the concentration of the components.
This statement is apply to a solution's concentration. Physical properties can be measured without changing the composition of substance. For example : The boiling point of 2 gram substance and 10 grams of substance will always remain same.
(2) Boiling points and freezing points of solutions change as the concentration of the solute changes.
This statement is apply to a solution's concentration. As we know that the boiling and freezing point of solution depends on the number of moles of solute or concentration of solute. So, as the concentration of solute changes the boiling and freezing point of solution.
(3) Moles of solute = (Liters of solution) x (Molarity of solution)
This statement is apply to a solution's concentration. As we know that the molarity is defined as the number of moles of solute present in one liter of volume of solution.
(4) (Initial Concentration)(Initial Volume) = (Final Concentration) (Final Volume)
This statement is apply to a solution's concentration as per dilution law.
(5) Concentration affects if an acid is weak or strong.
This statement is apply to a solution's concentration. As the concentration of an acid and base is the amount of moles of solute per unit volume. That means if a solution has higher molarity, then the concentration is also higher and vice-versa.
Hence, all the given options are applicable for a solution’s concentration.
1531 mL of a gas is collected at 9.4 mm Hg. What will the volume be at standard pressure? Standard pressure is 760 mm Hg.
Answer:
18.94 mL.
Explanation:
We can use the general law of ideal gas: PV = nRT.where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If n and T are constant, and have two different values of V and P:
P₁V₁ = P₂V₂
P₁ = 9.4 mm Hg, V₁ = 1531.0 mL.
P₂ = 760.0 mm Hg, V₂ = ??? mL.
∴ V₂ = P₁V₁/P₂ = (9.4 mm Hg)(1531.0 mL)/(760.0 mm Hg) = 18.94 mL.
transfer of energy by the wave to the medium through which it travels
Energy transfer in waves involves a disturbance that propagates through a medium, causing particle oscillation and energy transmission. For example, sound waves transfer energy through air via compression and expansion of air molecules. Waves do not move the particles but rather transfer energy through them.
Energy transfer in waves involves the propagation of a disturbance through a medium. This disturbance causes particles of the medium to move away from their equilibrium position, transferring energy from one particle to the next. This transfer occurs as the wave travels through the medium, causing the particles to oscillate back and forth.
For example, in acoustics, energy is transferred via vibrational waves. When a sound wave travels through the air, it compresses and expands air molecules, creating pressure variations that propagate through the medium as a longitudinal wave. These oscillations result in a transfer of energy from the source of the sound to the receiver.
Generally, a wave does not transport the particles of the medium over a distance, but it does transmit energy and momentum. Key characteristics of waves include a disturbance in space and time and a medium with elasticity that can return to equilibrium after deformation.
Types of Waves
Mechanical Waves: Require a medium, e.g., sound waves through air.Electromagnetic Waves: Do not require a medium, e.g., light waves through a vacuum.A visual illustration used to show mathematical relationships is called a .
Answer:
graph
Explanation:
A graph is a visual illustration of related numbers
A graph is the answer
how do polar and nonpolar covalent bonds differ?
Answer: In polar covalent bonds a pair of electrons are unequally shared between two atoms, while in nonpolar covalent bonds two atoms share a pair of electrons with each other.
I hope this helps :)
Explanation:
which equation represents a transuranium
Answer:
1) Since you have not provided the equations to select the right one, I am going to explain you the relevant facts that are used to solve this question.
2) The transuranium elements are the chemiical elements with atomic number greater than that of the uranium.
The atomic number of uranium is 92. So, the transuranium elements are the elements with atomic number 93 or greater.
This are some of the transuranium elements:
Neptunio - 93
Plutonium - 94
Americium - 95
Curium - 96
Berkelium - 97
Californium - 98
Einstenium - 99
And so all the known elements (the last one is the 118).
3) In a nuclear reaction the total mass number ( shown as superscript to the left of the symbol) and total atomic number (shown as subscript to the left of the symbol) are conserved.
4) Beta decay is the release of a beta particle, which is an electron (considered massles and with charge - 1). So, the beta decay is represented with the symbol:
0
β, which means 0 mass and charge - 1.
-1
5) This is, then, an example of a β decay equation for one transuranium element:
239 239 0
Np → Pu + β
93 94 -1
As you see 239 = 239 + 0 and 93 = 94 - 1, showing that the total mass number ( shown as superscript to the left of the symbol) and the total atomic number (shown as subscript to the left of the symbol) are conserved.
Explanation:
what does parent material refer to? a. soil source b. organic matter c. underlying bedrock d. soil aggregates
Answer:Soil source
Explanation:
Answer:
soil source
Explanation:
1.09 g of hydrogen contained in a 2.00L container at 20.0 °c what is the pressure in the container
Answer:
6.55 atm
Explanation:
we can use the ideal gas law equation to find the pressure of the container
PV = nRT
where P - pressure
V - volume
n - number of H₂ moles - 1.09 g / 2 g/mol = 0.545 mol
R - universal gas constant - 0.08206 L.atm/mol.K
T - temperature in kelvin - 20 °C + 273 = 293 K
substituting the values in the equation
P x 2.00 L = 0.545 mol x 0.08206 L.atm/mol.K x 293 K
P = 6.55 atm
pressure in the container is 6.55 atm
A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. Which term most likely describes what she is measuring? final pressure atmospheric pressure combined pressure partial pressure
Partial pressure is what the scientist would measure. 100%
Answer:
D
Explanation: its brackin cuz
What is the kinetic energy in kJ of 1 mole of water molecules (mass=18) if the average velocity is 590 m/s (1300 mph)
Answer:
= 3132.9 Joules
Explanation:
Kinetic energy is the energy possessed by a body when in motion.Kinetic energy is calculated by the formula; K.E = 1/2 mV², where m is the mass of the body or object, and V is the velocity.Therefore kinetic energy depends on the mass and the velocity of the body or the object in motion.In this case;
Kinetic energy = 0.5 × 0.018 kg × 590²
= 3132.9 Joules
Need help !!!!! Stuck asap
The answer is:
Hence, the new pressure will be 2.07 atm.
[tex]P_{2}=2.07atm[/tex]
Why?Since we know that the gas is inside of a rigid container, meaning that the volume will be kept constant, we can solve the problem using the Gay-Lussac's Law.
The the Gay-Lussac's Law establishes that when an ideal gas is kept at the same volume, the pressure and the temperature will be proportional.
We need to pay special attention when we are working with the Gay-Lussac's Law since its equaitons works with absolute temperatures (Kelvin ), so, if we are working with relative temperatures such as Celsius degrees or Fahrenheit degrees, we need to convert the temperatures to Kelvin.
We can convert from Celsius degrees to Kelvin using the following formula:
[tex]Temperature(K)=Temperature(C\°)+273[/tex]
So, we have the Gay-Lussac's equation:
[tex]\frac{P_{1}}{T_{1}}=\frac{P_{2}}{T_{2}}[/tex]
Also, we are given the following information:
[tex]T_{1}=30\° \\P_{1}=2atm\\T_{2}=40\°[/tex]
Therefore, converting the temperature to Kelvin, we have:
[tex]T_{1}=30C\°=30+273K=303K\\\\T_{1}=40C\°=40+273K=313K\\[/tex]
Now, calculating we have:
[tex]\frac{P_{1}}{T_{1}}=\frac{P_{2}}{T_{2}}[/tex]
[tex]P_{2}=\frac{P_{1}}{T_{1}}*T_{2}\\\\P_{2}=\frac{2atm}{303K}*313K=2.07atm[/tex]
Hence, the new pressure will be 2.07 atm.
[tex]P_{2}=2.07atm[/tex]
Have a nice day!
Balance this reaction Al4C + H2O = Al(OH)+ CH4
Answer:
Al₄C₃ + 12H₂O ⟶ 4Al(OH)₃ + 3CH₄
Explanation:
The correct formulas are
Al₄C₃ + H₂O ⟶ Al(OH)₃ + CH₄
Often, the best way to start is to balance all atoms other than O and H, then balance O, then balance H.
1. Put a 1 in front of the most complicated-looking formula (Al₄C₃):
1Al₄C₃ + H₂O ⟶ Al(OH)₃ + CH₄
2. Balance Al:
We have fixed 4 Al on the left. We need 4 Al on the right. Put a 4 in front of Al(OH)₃.
1Al₄C₃ + H₂O ⟶ 4Al(OH)₃ + CH₄
3. Balance C:
We have fixed 3 C on the left. We need 3 C on the right. Put a 3 in front of CH₄.
1Al₄C₃ + 12H₂O ⟶ 4Al(OH)₃ + 3CH₄
4. Balance O:
We have fixed 12 O on the right. We need 12 O on the left. Put a 12 in front of H₂O.
1Al₄C₃ + 12H₂O ⟶ 4Al(OH)₃ + 3CH₄
Every formula now has a fixed coefficient. The equation should be balanced.
5. Check that atoms balance:
\[tex]\begin{array}{ccc}\textbf{Atom} & \textbf{On the left} & \textbf{On the right}\\\text{Al} & 4 & 4\\\text{C} & 3 & 4\\\text{H} & 24 & 24\\\text{O} & 12 & 12\\\end{array}[/tex]
The balanced equation is
Al₄C₃ + 12H₂O ⟶ 4Al(OH)₃ + 3CH₄
Answer:Al4C + 4(H20) = 4AL(OH) +CH4
Explanation:
the equation is balance on both sides,
4 aluminums on both sides
1 carbon on both sides
8 hydrogens on both sides
4 oxygens on both sides
A boy blows up a balloon and knots the end. He leaves it on the kitchen counter. His little sister finds it and takes it outside in the sunshine.
According to Charles's law, which of the answer choices best predicts what will happen to the balloon?
Its pressure will increase.
Its temperature will decrease.
Its volume will increase.
Its volume will decrease.
I pretty sure it’s (C) it’s volume will increase.
I hope this helped!
Answer : The correct option is, Its volume will increase.
Explanation :
According to the Charles' Law, the volume of the gas is directly proportional to the temperature of the gas at constant pressure and number of moles.
[tex]V\propto T[/tex]
That means the volume of gas is directly depends on the temperature of the gas.
As, the temperature of the gas increase, the volume of gas will also increases and vice-versa.
As per question, when a boy blows up a balloon and knots the end then he leaves it on the kitchen counter. When his little sister finds it and takes it outside in the sunshine then the volume of the balloon increases due to increase in the temperature.
Hence, the correct option is, Its volume will increase.
Need help !!!!! Stuck
The answer is:
The new pressure will be equal to 6 atm.
[tex]P_{2}=6atm[/tex]
Why?Since we know that the temperature is constant, we can use the Boyle's Law to solve the problem.
The Boyle's Law establishes that when the temperature is kept constant, the pressure and the volume will be proportional.
So, we have the equation:
[tex]P_{1}V_{1}=P_{2}V_{2}[/tex]
We are given,
[tex]P_{1}=2atm\\V_{1}=150mL\\V_{2}=50mL[/tex]
Substituting and isolating [tex]P_{2}[/tex] from the Boyle's Law, we have:
[tex]P_{1}V_{1}=P_{2}V_{2}\\\\P_{2}=\frac{P_{1}V_{1}}{V_{2}}\\\\P_{2}=\frac{2atm*150mL}{50mL}=6atm[/tex]
Hence, the new pressure will be equal to 6 atm.
[tex]P_{2}=6atm[/tex]
Have a nice day!
What is the balanced equation for Al+Fe3N2>AlN+Fr?
Answer:
2 AL + Fe3N2 = 2 ALN + 3 Fe
The balanced equation for the reaction is 2 Al + Fe₃N₂ = 2AlN + 3Fe.
What is the reaction between aluminum and iron nitride?Aluminum reacts with iron nitride to form aluminum nitrate and iron metal.
The aluminum reacts slowly with nitrogen to form oxides and corrode.
The balanced equation is when both side of the reaction have equal moles of the compound.
Thus, the balanced equation for the reaction is 2 Al + Fe₃N₂ = 2AlN + 3Fe.
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1.) 3.4 moles Magnesium are mixed with 5.6 moles of Hydrochloric Acid. How many moles of Hydrogen gas are produced?
2. ) 3.4 moles of C3H8 are burned in the presence of 12.3 moles of oxygen gas. How many moles of Carbon Dioxide are produced?
3.) 5.3 moles of water (H2O) are produced from the combustion of methane (CH4). How many moles of Oxygen gas are required to produce the given amount of water?
4.) 3.7 moles of Lead (II) Nitrate are mixed with 7.8 moles of Potassium Iodide. How many grams of Potassium Nitrate will be produced?
Answer:
1. 2.8 moles of H₂
2. 7.38 moles of CO₂
3. 5.3 moles of O₂
4. 7.4 moles of KNO₃
Explanation:
Here are the steps to doing this:
1. Write the chemical equation of each reaction.
2. Balance the equation.
3. Find out the ratio between reactant and product
4. Determine the actual yield of your reactants.
5. The amount of product produced is determined by how much product the limiting reactant produces.
Let's do this!
1. Given: 3.4 moles of Magnesium(Mg) and 5.6 moles of Hydrochloric acid (HCl)
Equation:
Mg + 2HCl → MgCl₂ + H₂
Reactant to Product ratio
1 mole of Mg produces 1 mole of H₂ [tex]\dfrac{1moleof Mg}{1mole of H_{2}}[/tex]
2 moles of HCl produces 1 mole of H₂ [tex]\dfrac{2molesofHCl}{1mole of H_{2}}[/tex]
Determine actual yield of reactants
[tex]3.4moles of Mg\times\dfrac{1moleofH_2}{1moleofMg}=3.4molesofH_{2}\\\\5.6moles ofHCl\times\dfrac{1moleofH_2}{2moleofHCl}=2.8molesofH_{2}[/tex]
Since 5.6 moles of HCl can only produce 2.8 moles of H₂, before it is used up, then this means that that is all the product this reaction can produce.
2. Given: 3.4 moles of C₃H₈ and 12.3 moles of oxygen gas (O₂)
Equation:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Reactant to Product ratio
1 mole of C₃H₈ produces 3 moles of CO₂ [tex]\dfrac{1moleofC_{3}H_{8}}{3molesofCO_{2}}[/tex]
5 moles of O₂ produces 3 moles of CO₂ [tex]\dfrac{5molesofO_{2}}{3moleofCO_{2}}[/tex]
Determine actual yield of reactants
[tex]3.4molesofC_{3}H_{8}\times\dfrac{3molesofCO_{2}}{1moleofC_{3}H_{8}}=10.2molesofH_{2}[/tex]
[tex]12.3molesofO_{2}\times\dfrac{3molesofCO_{2}}{5molesofO_{2}}=7.38molesofCO_{2}[/tex]
The answer is then 7.38 moles of CO₂
**3. 5.3 moles of H₂O
This one is a little bit different. It is asking how much of a reactant is needed to produce the amount of product given. For this, just write a balanced equation for the reaction and get the ratio of reactant to product and solve for the actual yield. Since it is only asking for oxygen gas, you just need to do that one.
Equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Reactant to Product ratio
[tex]\dfrac{2molesofO_{2}}{2molesofH_{2}O}=\[tex]7.88molesofKI\times\dfrac{1moleofKNO_{3}}{1moleofKI}=7.88molesofKNO_{3}[/tex]
Actual yield:
[tex]5.3molesofH_{2}O\times\dfrac{1moleofO_{2}}{1moleofH_{2}O}=5.3molesofO_{2}[/tex]
The answer is 5.3 moles of O₂.
4. 3.7 moles of Lead (II) Nitrate (Pb(NO₃)₂) and 7.8 moles of Potassium Iodide (KI)
Equation:
Pb(NO₃)₂ + 2KI → PbI₂ + 2KNO₃
Reactant to Product ratio
[tex]\dfrac{2molesofKI}{2molesofKNO_{3}}=\dfrac{1moleofKI}{1moleofKNO_{3}}[/tex]
[tex]\dfrac{1molesofPb(NO_{3})_{2}}{2molesofKNO_{3}}[/tex]
Actual yield:
[tex]3.7molesofPb(NO_{3})_{2}\times\dfrac{2molesofKNO_{3}}{1moleofPb(NO_{3})_{2}}=7.4molesofKNO_{3}[/tex]
The answer is 7.4 moles of KNO₃.
Write a word equation for the overall reaction that occurred in the baggie. The reactants are sodium bicarbonate, carbon dioxide, and water. Write a balanced equation for the overall reaction that occurred in the baggie.
The reaction between sodium bicarbonate and sulfuric acid produces sodium sulfate, carbon dioxide, and water, as represented by the balanced chemical equation: NaHCO3 + H2SO4 → Na2SO4 + CO2(g) + 2H2O(l).
The word equation for the overall reaction occurring in the baggie, with sodium bicarbonate as a reactant, would typically be something like:
sodium bicarbonate + acid → sodium salt + water + carbon dioxide
When sodium bicarbonate (NaHCO3) is reacted with sulfuric acid (H2SO4), the balanced chemical equation for the reaction in the baggie would be:
NaHCO3 + H2SO4 → Na2SO4 + CO2(g) + 2H2O(l)
This shows sodium bicarbonate reacting with sulfuric acid to produce sodium sulfate, carbon dioxide gas, and water.
A biochemist would most likely study what ?
Answer:
Biochemists study chemical processes and chemical transformations in living organisms. Biochemists study DNA, proteins and cell parts. The word "biochemist" is a portmanteau of "biological chemist."
Explanation:
Final answer:
A biochemist would study the chemical processes within living organisms, focusing on the roles of proteins, nucleic acids, and other biological molecules in health and disease.
Explanation:
A biochemist would most likely study the chemical processes that occur in living things, which encompasses a range of disciplines from cellular biology to medicine. They particularly focus on understanding how biological molecules such as proteins, nucleic acids, carbohydrates, and lipids contribute to the structure of cells and support life's myriad functions.
Biochemists play a critical role in fields such as medicine, where they delve into disease causes and treatments, nutrition, assessing how to maintain health, and agriculture, working on improving crops and pest control. Their work involves analyzing enzymes, DNA, and other molecules to comprehend and manipulate the biochemical pathways that underlie health and diseases. This can include drug discovery and development, which is a complex process that may include detective work and experimentation to make human beings healthier.
A _______ property of salt is that it will _______ in water. A. physical; dissolve B. chemical; sink C. chemical; dissolve D. physical; corrode
Answer:
A
Explanation:
Dissolving a solid in liquid, in this instance table salt in water, is a physical change due to merely the state of the matter being altered. Physical changes almost always be reversed.
A A. physical property of salt is that it will dissolve in water.
Physical properties are characteristics that can be observed or measured without changing the substance's chemical identity. Examples include color, density, and solubility.
Chemical properties describe a substance's potential to undergo chemical changes or reactions and transform into a different substance. Examples include reactivity with acids and flammability.
When salt dissolves in water, it undergoes a physical change because the salt is merely dispersing at the molecular level within the water but remains chemically the same (sodium chloride). Therefore, dissolving is a physical property of salt.
What is the scientific term for something that is living and demonstrates the 7 life processes?
A. Thing
B. Ecology
C. Organism
D. Bacterium
Answer:
b
Explanation:
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